A dirty look.

Third-person singular simple present indicative form of look for trouble

(informal) to deliberately act in a way that's likely to lead to a fight. / (informal) to do things that are likely to cause problems.

present participle of look for trouble

(imperative) Synonym of look alive

(imperative) To get busy; start acting or moving.

Be unable to identify because one is trying too hard.

present participle of look forward to

Third-person singular simple present indicative form of look forward to

Third-person singular simple present indicative form of look up to