snarl up (third-person singular simple present snarls up, present participle snarling up, simple past and past participle snarled up)
- (transitive) to entangle
- (intransitive) To become tangled; to become entangled
- (transitive) To block (traffic); to cause (traffic) to be congested.
- (intransitive, of traffic) to become congested.
- (transitive) To pit into disarray; contort; confuse; muddle up