Slang from South West England, a squitter is a thoroughly nasty, smelly, disgusting squirt of liquid or semi-liquid faecal matter. Usually used as a plural, the squitters is an attack of diarrhoea brought on usually by overindulgence in alcoholic refreshment. Using squitter in the singular form means a single squirt of repulsive, stinking, watery shit and by extension a repulsive, stinking, watery shit of a person. In both cases the best thing to do is flush the toilet with plenty of disinfectant.

when you're hungover as shit after a spending a night drunk as a skunk

Sputtery, disgusting type of crap where you blow your hole out. The toilet is then filled with bits, often requiring a double-flush. Can also be used as verb.

When I bird spits fire rhymes like for example Birdalicious T