1)
What is the meaning of "b'Tzeis ha'Yayin mi'Naval"?
1.
Rashi citing Targum Yonasan: When the wine wore off (he sobered up). Radak - he similarly translated "Hasiri Es Yeinech me'Alayich" (1:14) 'ha'Lo Sefigin Yas Chamreich Minayich.'
2)
What is the meaning of "va'Yamas Libo"?
1.
Rashi: He was very upset [about the gift to David].
2.
Radak: He became mute and like a Mes.
3.
Malbim: Fear of David cane upon him, and [fear] of the danger he had been in. His blood cooled, and "he was like a rock."