to rather forcefully expell wind from the anus usually with a good strain..

The act of masturbation to orgasm.

To set fire to ones flatulent gassy fart. Can be done alone or as a party piece. If done with a crowd of mates a competitive element may arise to see who can burn off the longest flame.

Male masturbation.

Slang; To pleasure ones penis until it shoots its creamy load.

Male masturbation, generally when not at home.

slang for masturbating