Top definition
Immediately, at once, right away, instantly.

A very short time as denoted by the time it takes for the heart to beat.

Similar phrase: in the blink of an eye.

Oooh, i miss you in a heartbeat. Oooh, i miss you right away.
(Lyrics: Def Leppard - Miss You In A Hearbeat)
by yaeyae October 19, 2006
Get the mug
Get a in a heartbeat mug for your grandma Julia.
Apr 21 Word of the Day
I've been jabbed
by Francesco II March 20, 2021
Get the mug
Get a jabbed mug for your guy Rihanna.

Activity