Akademik

unstick
v. & n.
—v. (past and past part. unstuck)
1 tr. separate (a thing stuck to another).
2 Aeron. colloq. a intr. take off. b tr. cause (an aircraft) to take off.
—n. Aeron. colloq. the moment of take-off.
Phrases and idioms:
come unstuck colloq. come to grief, fail.

Useful english dictionary. 2012.