In 5 studies (N = 756), we show that men's relative to women's gender ingroup identities are characterized by greater levels of gender dichotomization, a tendency to distance masculine from feminine traits. We demonstrate further that men's gender dichotomization is motivated, in part, by a need to eschew femininity from their ingroup identity to bolster a precarious gender status. Studies 1-3 establish and replicate the basic effect, and rule out alternative explanations (positivity, projection, status striving) for men's tendency to dichotomize more than women. Studies 4 and 5 demonstrate the motivated nature of gender dichotomization by establishing that men, but not women, dichotomize more strenuously when reminded of the precariousness of their gender status, and report stronger motivation to restore their gender status upon learning that their ingroup is becoming less dichotomized. Across 3 studies, strength of identification with their gender group moderates men's dichotomization tendencies. Discussion considers the implications of these findings for understanding the precarious nature of manhood and identifies practical applications of gender dichotomization in the interpersonal realm.