Mantrap

[Dave Paprocki]

A dangerous place, as an open hatch, into which one may
fall.

[Gregory]

What a [spinster] does when she [accidentally] gets [impregnated] by her lover and he ends up marrying her.

[Vania]

A mantrap, in modern world, means a small room that is [encased] or made-of metal, and contains two or more doors. The principal rule is that both doors cannot be open at the same time.
If a person needs to access a facility, he must access it through a mantrap. He might use a keycard to open the first door, then enter the mantrap and close the door behind him, and only then he can enter his personal PIN (for an example, could be biometric as well) which, if entered correctly, will open the second door.
Failure to enter [the PIN] code, or trying to force either of the doors open, will trigger an alarm. An [intercom] system will be activated, and an announcer will notify that a guard-team has been [dispatched] to clear the solution, and [apprehend] the suspect to the police.
Such boxes usually also contain tailgate-prevention technologies, so that only one person can enter at a time.
In history, mantraps could also cause deadly forces at [the intruder], possibly by using a sleeping-gas, [impaling] spikes or emitting a high-energy noise. Such are illegal today.
Mantraps are very scary to the people who rarely use them. The smell, the sounds... And when you enter a mantrap, the silence is somewhat disturbing. Theres a set amount of time in which you need to enter your code, or an alarm will be triggered. This could be 10 seconds or less.
Most advanced mantraps enforce tailgating-prevention by [taking it to the next level], with pressure-sensitive plates on the floor. What this means is that when you show your keycard at the first door, the mantrap recognises who you are, and fetches your last weight from the databases. When you enter the mantrap, the pressure sensitive plates at the floor will measure [your weight], and if its too far off from the last weight, itll trigger an alarm. This effectively prevents two people from going in together, but if youre carrying something heavy, you cannot pass.
Metal detectors can also be included, so that if you carry ANYTHING metal, the second door wont open. A guard-team is dispatched to investigate what you are carrying in or out.

[Dave Paprocki]

A [womans] [vagina]

[Merna]

An act performed during a threesome with three gay male participants. The man in the middle is penetrated on both ends, his [mobility] restricted by the simultaneous thrusts of his partners. This is often performed in a specially built [enclosure] with two [glory holes] on opposite walls. The enclosure is also often called a mantrap.

[Donald Trump]

A trap for catching people, especially trespassers or poachers.