When It Rains, It Pours - S5-E2
Continuity mistake: When Liz flicks her cowboy hat at Pete he exclaims "you got sauce on me." When the scene starts Pete's shirt is clean. As Liz flicks her hat the camera points at Pete and there's already lots of sauce on his shirt, before one extra bit hits him. As Liz walks away and camera cuts back to Pete at the end of the scene and the extra sauce from the flick has gone.
Answer: Maybe s02e14, "Sandwich Day"? Liz is talking to Floyd and asking if the girl who answered his phone has a lower back tattoo with a Chinese character that is suppose to mean "peace", but probably means "I have chlamydia." But nothing about it being a tribal tattoo.
Bishop73