1 definition by EJO, UK

Top Definition
UYB
Acronym: Up Your Bum/Butt is a safer alternative to femoral injecting for drug users.

While UYB is a safer alternative for injectors it carries greater risks than other non-injecting ways of taking drugs such as smoking, swallowing, or snorting.

Drugs taken UYB have a faster and fuller effect than when smoked.
My groin is pinned to shit, gonna have to go UYB.
by EJO, UK July 10, 2008

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug