What to look for during my self-breast exam.

What does my tumor feel like?

One of the things my friends and random people keep asking is, "what does it feel like?" so I was hoping you and others would share with other women what a lump feels like. I for one was very confused as to what to feel for during exams. So I thought we might share our similes for comparing a lump, bump in the breast that "probably shouldn't be there, " as my GP said...

I told Em, "It feels like a jelly bean under a blanket." It also feels "heavy," or makes my breast feel like a small metal weight is there...a penny weight, as a jeweler would measure.

And turns out, it is exactly that, but not inanimate, but alive and has been growing until this moment I felt it and was certain it shouldn't be there. 

What was your first "feel" of it, so that we have an idea of what to tell other women whate they're looking for?