1. Bommyknocker: Two people in bed, at least one of whom must be male, the man rolls over towards his partner, causing his penis to 'flop' onto their leg or belly.
2. Bommyknocker
substitution: Slapping somebody
on the leg using your outside arm, indicating that they have just been figuratively
cockslapped.
3. Verbal Bommyknocker: Using all of your tact and wit to orally wang-whack your unsuspecting foe.