The act of ejaculating on your partners stomach and pressing your stomach against theirs marking a glue like substance between the two bodies.

learned from speed tv: Clag is the bits of rubber that get thrown off the tires to the side of the road outside the racing-line.

when arse hair gets matted together with shit when you don't wipe your bottom properly.

Clag can also refer to any smoke or byproduct of a large diesel engine's Starting or pulling heavy loads as seen with trains and semi's

the cyber version of a slag.

cunts + slags = clags

An aviation acronym that originated within the Royal Air Force. It stands for "Cloud Low, Aircraft Grounded", but nowadays it is often used in general usage to describe grey, drizzly low laying cloud.