The act of sexual intercourse.

Expression used by cyclists to describe excercise induced low blood sugar levels; being a feeling of light-headedness and weakness in all limbs. Similar to 'The Wall' in running. Has fallen out of usage in recent years due to alternative meanings.

The sound that "The Scout" character makes when hitting enemies with his aluminium baseball bat in the video game Team Fortress 2.

1)referance the act of sexual intercourse
2)to bump into or hit
3)old video game, featuring bald prehistoric boy, that killed enemies by head butting

1. Have sexual intercourse with.
2. To hit, particularly hitting a person on the head.
3. During the hayday of MUDs (Multi-User Dungeon games, text-only roleplay like adventure games played mostly over the net) a commonly said or done action as a sign of mild disapproval or for no particular reason. Polite convention require(d/s) the bonked individual respond by saying oif. Some believe not doing so will upset the bonk/oif balance in the universe, with great consequences. Not saying "oif" is somewhat akin to a ( without a ) or unmatched quotation mark. The practice is still somewhat alive on IRC and (to an even lesser degree) other means of net chat. It has, however, to a large degree been replaced by the fish slap.

To strike someone with a foreign, hard plastic object. A bonk will usally result in a loud "crack" if performed corectly. A well place hit on the elbow, head (skull), knee, or spine will result in a red inflammed welt which will be sensitive to the touch for hours.

whack; lame; obserd; un-cool