Warm down under ???

Meagan
I'm 10 DPO ( and I've been having discharge as well) ( period is suppose to start within the next two days , by what the <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> calendar says ) and my boyfriend and I had intercourse tonight, he said Im warm down under. 
What does that mean??