to study one’s brains out

Idiom: to study one’s brains out

Context #1:

Jim:  How did you do on the grammar test?
Sam: I got 100%.  I studied my brains out for that test.
Jim:  Nice job!

Context #2:

Chrissy: Are you preparing for the GRE exam?
Tammy: Yeah, I've been studying my brains out for the last 6 months.
Chrissy:  Well I'm sure you'll do great!

Meaning: to study one's brains out means to study extremely hard for something.

SHOPPING SPREE

Example 1:

Jenny: I won a $2,000 shopping spree at TNA! I'm heading there right now, want to come?
Vanessa: Hell, yeah! Let's go!!

Example 2:

Maria: I wish I didn’t go on that shopping spree two weeks ago!

Tatsu: Why? You were so happy with everything that you bought.

Maria: I know! But now I’m short on rent.

Tatsu: Yikes!

Shopping Spree:  To go to a mall and spend all your money buying many things, especially clothes, jewelry, makeup, etc.