What is the hip hop song that sounds kind of Irish and in chorus it says something like lets raise a pipe to ones who are not with us?

The song you're referring to is "Remember the Titans" by DJ Kay Slay. Here's the relevant part of the chorus:

_"Raise your cup, raise your glass

Raise your bottle, raise your brew

Raise your flask, raise your pipe, raise your glass

Raise 'em high for the ones who ain't here_"