trip master
Someone who stays sober and makes sure people participating in a trip on any kind of drug don't do anything really stupid or dangerous
dude 1: yo dude, wanna try acid?
dude 2: hell yah
dude 1: ok we just gotta find a trip master so we don't jump out of any windows or anything
dude 2: hell yah
dude 1: ok we just gotta find a trip master so we don't jump out of any windows or anything