clump up
English
editVerb
editclump up (third-person singular simple present clumps up, present participle clumping up, simple past and past participle clumped up)
- (transitive, intransitive) To become clumpy; to form a clump.
clump up (third-person singular simple present clumps up, present participle clumping up, simple past and past participle clumped up)