Mea culpa

[Becky]

Latin for my fault. Mea being my. Culpa being fault or cause, also the root word for culpability.

[PussyCat]

Literally my fault in Latin.

[PussyCat]

through/by my fault

an admission of guilt and culpability.

latin--both words are in the ablative; syntactically here the ablative of means

Its not really my bad as much as it is, this happened because of my problem. it isnt nearly as casual, and significantly more causal.

[Couch Potatoe]

A latin phrase meaning my fault used mainly by politicians where the action or behavior for which fault is admitted is indefensible and/or inexcusable; the phrase is employed in order to admit fault less bluntly and in a way that is not readily comprehended as such by the general population.

[Becky]

my bad, or my bag. when you have made a mistake and are apologizing.

[Sarah]

used to admit that something was your fault