i've been hanging out with billy whiz and the ickle fellas all weekend and haven't slept for 3 days  or  he's whizing his tit's off
uk street term for amphetamine
"i've been hanging out with billy whiz and the ickle fellas all weekend and haven't slept for 3 days  or  he's whizing his tit's off" What is the definition of "billy whiz"?