Meaning of いっぱい in Japanese

彼は、ガールフレンドを無理やりいっぱい付き合わせた。
He made his girlfriend go out for a drink with him.

もう一杯機嫌だね。
You're lit up like a Christmas tree.

その速さで精一杯ですか。
Is that as fast as you can go?

彼は力いっぱい引っ張ったが、岩はびくともしなかった。
He pulled with all his strength but the rock would not move.

家に帰って朝食を腹一杯に食べた。
I went home and ate a hearty breakfast.

彼は砂を手いっぱいにすくいあげた。
He scooped up sand by the handful.

残念ながら、サッカーの試合、一敗地に塗れてしまったよ。
It's too bad but we got pummeled at the soccer match.