Definitions of snarl:

• noun:   an angry vicious expression
• noun:   a vicious angry growl
• noun:   something jumbled or confused
• verb:   make more complicated or confused through entanglements
• verb:   make a snarling noise or move with a snarling noise

  Example: "Bullets snarled past us"

• verb:   utter in an angry, sharp, or abrupt tone

  Example: "The guard snarled at us"

• verb:   twist together or entwine into a confusing mass