Bashing

[Rihanna]

criticizing or defaming

hating and violently attacking someone or something on sight

[Hina Muqadas]

Hitting someone or something hard.
Giving someone a going over, beating them up.
Criticising or insulting, in a derogatory manner, something which you dont like. Usually refers to different cultures or countries.

[Britney]

The concept of saying rude things about a certain subject over the Internet.

[Vania]

to travel behind a locomotive hauled train of rail carriages (bashing haulage) usually on a Preserved line, bashing has been a gricers term for many a year with thousands of bashers out most weekends doing haulage - and paying good money for the privilege.

[Magaret]

Bash: to flame; to put down
A term used when fellow watchers, readers, and fans of an anime/manga/book/TV series put down, flame, and say derogatory things about a certain character or pairing in a nasty way to show their disapproval towards that character and/or pairing. Can be seen both in fanfiction and discussion forums.
Most fans are seen flaming a certain character because he/she is interfering with their favorite pairing in the show:

[Merna]

to masturbate; [wanking]

[Sarah]

Fingering with the intent to wound

[Magaret]

In the RC world, bashing is racing without rules or regulations. It is just driving and testing the limits of your RC car or truck. Bashing includes making high jumps and not worrying too much about the landing. Wrecks are not something to be avoided but rather something to laugh about.

[Vania]

1. process of which you fuck someones skull

2. Fucking someones brains out

3. Key = penis, keyhole = mouth

[Ernesto]

Cruising, Parking, or otherwise just being on Wabash Avenue in Terre Haute, IN on a Friday or Saturday night because, as a dirty Hautian, you have nothing better to do.

[Britney]

Violent physical assault.