Birfmas

A combination someone's birthday and christmas usually in order to provide a single but disappointing gift.

"Hey these shrinky dinks are already shrunk"

"Happy Birfmas"

by Idontknowwhatthatmeansnoitsnot October 9, 2011

Birmas

When your birthday occurs on or near Christmas, and people double up on gifts, giving you one gift for both birthday and Christmas

“Hey, nice sweater with matching hat, Sal.”
“Yeah…they make up my Birmas gift.”

by Sacc for days December 11, 2022