The Collaborative International Dictionary of English v.0.48:
kibbutznik \kib*butz"nik\ (k[i^]b*b[oo^]ts"n[i^]k; k[i^]b*b[=oo]ts"n[i^]k), n. [kibbutz + -nik.] a member of a kibbutz. [WordNet 1.5]WordNet (r) 3.0 (2006):
kibbutznik n 1: a member of a kibbutz