The time early on in a new relationship where a man or woman will do anything to see their gilfriend or boyfriend. You can tell a person is in their sprung phase if they get jealous of their gilfriend or boyfriend's ex, drop in on their gilfriend or boyfriend at work or can't stop showing pictures of their new girlfriend or boyfriend to every one they know.
Duder 1: "Check out my new girl's facebook. She's so hot huh?"

Duder 2: "Sure dude, whatever you say. I'm not into the asians like you are."

Duder 1: "What? Everybody else said she's such an upgrade. Wanna go visit her? She works at Macy's."

Duder 2: "Whoa, you just want to drop in on her? You're definitely still in the sprung phase."
by westfalia January 13, 2010
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