meaning of makuri

What is 地が出まくり?

地 "ji" means someone’s nature (in this context),
出る"de(ru)" means express (in this context),
まくり"makuri" means doing something too much.
So 地が出まくり means "you express your character too much."
But we use this expression only when the character you express is positive.
I’ll give you some example. In some party, you talk to too many girls one by one, and then we may say 「地が出まくり」. Because of you express the nature that “you love girls too much”. But, in the same party, you are too shy and don’t talk to no one, we don’t say like this.

And, since it is very playful, casual and friendly expression, we mainly use it when we think you’re acceptable (or at least we aren't angry for you).