Tutu : nm arg. Wine ; Red wine ; wine, glass of wine.
A tutu shot means a glass of Red wine. In the long list of slang qualifiers for wine, tutu joins pinard, picrate, jinjin, jaja and the others.
"Tutu" would come from tortu designating twisted wood, in other words the vine.
Another explanation concerning tutu for the flute and its onomatopoeia turlututu: play a tune by imitating the sound of the flute, otherwise
says whistle or drink or booze.