pissing
v. C2 Proficiency US //ˈpɪˌsɪŋ// UK //pˈɪsɪŋ// piss·ing
v. to go to the bathroom. It is a very rude and informal way to say you are emptying your bladder.
v. to urinate. Highly informal and vulgar in register; frequently used in the progressive form to describe the act or as an intensifier in British English.
He is pissing behind that tree.
The dog spent the whole walk pissing on every single lamp post we passed.
The rain was pissing down so hard that the hikers could barely see the trail markers ten feet ahead of them.
Usage
Often used as part of the phrasal verb 'pissing down' to describe heavy rain.
Pitfall
He is pissing the wallHe is pissing on the wallWhen used to mean urinate, the verb is intransitive and requires a preposition like 'on' or 'against' before the object.