lifesaver(redirected from a life saver)
Someone or something that provides crucial help in a difficult situation. The term is almost always applied to situations that are not literally life-threatening. You're a real lifesaver for coming over and fixing my flat tire. The knife I brought on the camping trip turned out to be a lifesaver when we realized we had forgotten a can opener.
you're a lifesaver
You are wonderfully helpful, especially at a time of crucial importance. You brought me coffee? Ah, you're a lifesaver. Thank you much for picking up the cupcakes on your way to the party—you're a lifesaver.
See also: lifesaver
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.