Twice removed means that there is a two-generations difference. You are two generations younger than a first cousin of your grandmother, so you and your grandmother's first cousin are first cousins, twice removed.”

The coolest comeback ever.

1- Great-great-grandparent's sibling's grandchild / Grandparent's second-cousin.
2- Grandparent's sibling's great-great-grandchild / Second-cousin's grandchild.

1- Grandparent's sesqui-first-cousin.
2- Sesqui-first-cousin's grandchild.
3 - Child of the parent's half-grandpibling with the other parent's grandpibling.
4 - Child of the parent's half-grandnibling with the other parent's grandnibling.
5 - Child of the parent's half-grandnibling with the other parent's grandpibling.
6 - Child of the parent's half-grandpibling with the other parent's grandnibling.

1- Grandparent's half-first-cousin.
2- Half-first-cousin's granchild.

1- Great-grandparent's sibling's child / Grandparent's first-cousin.
2- Parent's sibling's great-grandchild / First-cousin's grandchild.

1- First-cousin-twice-removed's spouse.
2- Spouse's first-cousin-twice-removed.
3- 1C2R-in-law.