Microaggressions, first created by Harvard Professor Chester Middlebrook then further developed by Counseling Psychologist Derald Wing Sue defines microaggressions as brief and commonplace daily verbal, behavioral and environmental indignities, whether intentional or unintentional that communicate hostile, derogatory, or negative slights or insults to a target person or group. What do you do when you receive them, what do you do when you commit them.
References
Brown, B., (2010) The Gifts of Imperfection: let go of who you think you’re supposed to be and embrace who you are. Center City, MN. Hazelden.

Ray, L.,  Smith, D., Wastell, L.,(2004) Shame, Rage and Racist Violence, The British Journal of Criminology, Volume 44, Issue 3, May (2004), Pages 350–368, https://doi.org/10.1093/bjc/azh022

Sue, D. W., Capodilupo, C.M., Torino, G. C. Bucceri, J. M., Holder, A. M. B., Nadal, K.L., & Esquilin, M. E. (2007). Racial Microaggressions in everyday life: Implications for clinical practice. American Psychologist, 62(4), 271-286.

Sue, D. W., Spanierman, L., (2020) Revised Edition of Microaggressions in everyday life. Hoboken, NJ. Wiley.

Torino, G.  (2017, November 10) How racism and microaggressions lead to worse health. Retrieved from https://centerforhealthjournalism.org/2017/11/08/how-racism-and-microaggressions-lead-worse-health