Top Definition
1. A monumental fuck up.
- A howler is only a small fuck up, a full howler is much worse.

2. Said after someone has had a monumental fuck up.
1.

"John had a full howler when he fell down the stairs today."

2.
John: *falls down the stairs*
Sean: "Full howler."
by Full Howler May 18, 2014
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